If you haven't yet been hit by iMessage spam, you're lucky: It's awful. And it's even worse when you realize that the spammer can know with certainty that the unwanted message really was delivered to you. As first noted by MacStories, Apple recently posted a way to deal with unwanted iMessages in your inbox, which we first covered at the Hints site.Related StoriesKindle iOS app offers free samples, straddles Apple's in-app purchase rulesMac Gems: Push to Talk creates a mute switch for your Mac's mic
